CN111099145A - Back suction emulsion pump - Google Patents

Abstract

A suck-back emulsion pump comprises a press head, a screw thread, a lock cover, a body, a main column, an auxiliary column, a piston and a pressure spring, wherein the auxiliary column is provided with a guide cavity along the axis and a containing cavity with a lower opening positioned at the lower part of the guide cavity, and the guide cavity is communicated with the containing cavity; the movable piece comprises a rod body part and a valve core part, and the valve core part comprises a hollow inverted conical frustum-shaped core body and a cylindrical part; the lower end of the rod body part is fixedly connected with a bottom plate of the inverted cone frustum-shaped core body; the rod body part is in sliding fit with the guide cavity, and the rod body part and the guide cavity are in liquid-gas sealing; the pressure spring is matched with the top plate and the step of the accommodating cavity; the inverted cone frustum-shaped core body is matched with the inverted cone frustum-shaped one-way valve seat, and the cylindrical body part is in sliding fit with the rib plate at the lower part of the step; the upper end of the valve core part is matched with the lower end of the pressure spring to stop. Due to the adoption of the structure, the valve core part is tightly matched with the inverted cone frustum-shaped one-way valve seat; the liquid in the liquid outlet pipe on the press head can be sucked back by pressing and resetting, so that the pollution is effectively prevented.

Description

Back suction emulsion pump

Technical Field

The invention relates to an emulsion pump.

Background

In the prior art, the emulsion pump comprises a press head, a screw thread, a lock cover, a body, a main column, an auxiliary column, a piston, a pressure spring and a glass ball, wherein the press head comprises a liquid outlet pipe, a liquid inlet channel and a cylindrical sleeve surrounding the liquid inlet channel; a guide sleeve is arranged on the top plate of the screw thread; the lock cover is inserted into the body and connected into a whole, the auxiliary column is inserted into the main column, and the piston is arranged on the auxiliary column; the upper end of the main column penetrates through the lock cover and extends into the guide sleeve, and the main column is fixedly connected with the liquid inlet channel of the press head; the glass ball is matched with the one-way valve seat at the lower end of the body. There are problems in that: after the push-down reset, residual liquid exists in the liquid outlet pipe and is polluted by air.

Disclosure of Invention

The purpose of the invention is: provides a suck-back emulsion pump which can effectively suck back the liquid in a liquid outlet pipe and prevent pollution.

The invention is realized by the following steps: a kind of suck-back emulsion pump, including pressing the head, thread, lock cover, body, main column, auxiliary column, piston and compression spring, press the head to include drain pipe, liquid inlet channel and surround the cylindrical sleeve of the liquid inlet channel; a guide sleeve is arranged on the top plate of the screw thread; the lock cover is inserted into the body and connected into a whole, the auxiliary column is inserted into the main column, and the piston is arranged on the auxiliary column; the upper end of the main column penetrates through the lock cover and extends into the guide sleeve, and the main column is fixedly connected with the liquid inlet channel of the press head; it is characterized in that: the auxiliary column is provided with a guide cavity along the axis and an accommodating cavity with a lower opening positioned at the lower part of the guide cavity, and the guide cavity is communicated with the accommodating cavity;

the lower end of the body is provided with an inverted cone frustum-shaped one-way valve seat and a cylindrical part from bottom to top, rib plates which are uniformly distributed are arranged on the inner wall of the cylindrical part, the lower ends of the rib plates extend to the upper part of the inverted cone frustum-shaped one-way valve seat, and steps are arranged on the rib plates;

the movable piece comprises a rod body part and a valve core part, and the valve core part comprises a hollow inverted conical frustum-shaped core body and a cylindrical part; the lower end of the rod body part is fixedly connected with a bottom plate of the inverted cone frustum-shaped core body;

the rod body part is in sliding fit with the guide cavity, and the rod body part and the guide cavity are in liquid-gas sealing; the pressure spring is matched with the top plate and the step of the accommodating cavity; the inverted cone frustum-shaped core body is matched with the inverted cone frustum-shaped one-way valve seat, and the cylindrical body part is in sliding fit with the rib plate at the lower part of the step; the upper end of the valve core part is matched with the lower end of the pressure spring to stop.

The suck-back emulsion pump is characterized in that: the outer circumferential surface of the cylindrical part of the valve core part is provided with a plurality of radial plates, and the radial plates are positioned between two adjacent rib plates.

According to the back suction emulsion pump, due to the adoption of the structure, the valve core part is tightly matched with the inverted cone frustum-shaped one-way valve seat; the liquid in the liquid outlet pipe on the press head can be sucked back by pressing and resetting, so that the pollution is effectively prevented.

Drawings

Fig. 1 is one of the cross-sectional views of the present invention.

Fig. 2 is a second cross-sectional view of the present invention.

Fig. 3 is a view a-a of fig. 2.

Fig. 4 is a perspective cross-sectional view of the body of the present invention.

Figure 5 is a perspective view of the moveable member of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, a suck-back emulsion pump comprises a press head 1, a thread 2, a lock cover 3, a body 4, a main column 5, an auxiliary column 6, a piston 7 and a pressure spring 8, wherein the press head 1 comprises a liquid outlet pipe 11, a liquid inlet channel 12 and a cylindrical sleeve 13 surrounding the liquid inlet channel; a guide sleeve 21 is arranged on the top plate of the screw thread 2; the locking cover 3 is inserted into the body 4 and connected into a whole, the auxiliary column 6 is inserted into the main column 5, and the piston 7 is arranged on the auxiliary column 6; the upper end of the main column 5 penetrates through the lock cover 3 and extends into the guide sleeve 21, and the main column 5 is fixedly connected with the liquid inlet channel 12 of the press head 1. The liquid inlet channel 12 is in sliding fit with the guide sleeve 21, and the lower end of the cylindrical sleeve 13 is matched with the top plate of the thread 2 to stop.

The auxiliary column 6 is provided with a guide cavity 61 along the axial line and an accommodating cavity 62 with a lower opening positioned at the lower part of the guide cavity, and the guide cavity 61 is communicated with the accommodating cavity 62;

the lower end of the body 4 is provided with an inverted cone frustum-shaped one-way valve seat 41 and a cylindrical part 42 from bottom to top, rib plates 43 which are uniformly distributed are arranged on the inner wall of the cylindrical part 42, the lower end of each rib plate 43 extends to the upper part of the inverted cone frustum-shaped one-way valve seat 41, and a step 431 is arranged on each rib plate 43;

the movable element 9 comprises a rod body part 91 and a valve core part 92, wherein the valve core part 92 comprises a hollow inverted-conical-frustum-shaped core 921 and a cylindrical part 922; the lower end of the rod body part 91 is fixedly connected with the bottom plate of the inverted cone frustum-shaped core 921;

the rod body part 91 is in sliding fit with the guide cavity 61, and the rod body part 91 is in liquid-gas seal with the guide cavity 61; the pressure spring 8 cooperates with the ceiling of the housing chamber 62 and with the step 431; the inverted truncated cone shaped core 921 fits with the inverted truncated cone shaped one-way valve seat 41, and the cylindrical portion 922 fits slidably with the rib 43 at the lower portion of the step 431. The lower end of the accommodating cavity 62 is matched with the upper end of the cylindrical part 42 for stopping; as shown in fig. 2, the upper end of the valve body 92 is engaged with the lower end of the pressure spring 8.

The outer circumferential surface of the cylindrical portion 922 of the valve core portion 92 is provided with a plurality of radial plates 923, and the radial plates 923 are located between two adjacent ribs 43. The radial plate 923 is matched with the lower end of the pressure spring 8 to stop.

Fig. 1 is a sectional view of the present invention in a state of being pressed out, in which the distance between the upper end of the rod body portion 91 of the movable member 9 and the top of the guide chamber 61 is H1; the inverted cone frustum-shaped core 921 is tightly matched with the inverted cone frustum-shaped one-way valve seat 41, so that the sealing performance is improved; the liquid outlet speed is high;

in the state shown in fig. 1, under the action of the pressure spring 8, the push head 1, the primary column 5, the secondary column 6 and the piston 7 move upward together, the movable piece 9 moves upward along with the secondary column 6, and simultaneously, the movable piece 9 and the secondary column 6 move relatively, and the distance between the upper end of the rod body part 91 of the movable piece 9 and the top of the guide cavity 61 is H2; in the process of converting fig. 1 to fig. 2, the distance between the upper end of the rod body 91 of the movable member 9 and the top of the guide cavity 61 is gradually increased to form a pumping process, so that the residual liquid of the liquid outlet pipe 11 is pumped into the main column 5, that is, the residual liquid of the liquid outlet pipe 11 is sucked back into the main column 5, and the liquid is prevented from being polluted by the outside air and dust.

When the press head 1 is pressed, in the process that the press head, the main column and the auxiliary column move downwards, liquid quickly rushes into an annular cavity 93 formed by the valve core part 92 and the rod body part 91, the valve core part expands outwards, namely, an inverted cone frustum-shaped core body 921 of the valve core part expands outwards, and the inverted cone frustum-shaped core body 921 is in instant sealing fit with the inverted cone frustum-shaped one-way valve seat 41.

What has been described above is merely a preferred embodiment of the present invention. It should be noted that a person skilled in the art could make several modifications and variations without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

Claims (2)

1. A kind of suck-back emulsion pump, including pressing the head, thread, lock cover, body, main column, auxiliary column, piston and compression spring, press the head to include drain pipe, liquid inlet channel and surround the cylindrical sleeve of the liquid inlet channel; a guide sleeve is arranged on the top plate of the screw thread; the lock cover is inserted into the body and connected into a whole, the auxiliary column is inserted into the main column, and the piston is arranged on the auxiliary column; the upper end of the main column penetrates through the lock cover and extends into the guide sleeve, and the main column is fixedly connected with the liquid inlet channel of the press head; the method is characterized in that: the auxiliary column is provided with a guide cavity along the axis and an accommodating cavity with a lower opening positioned at the lower part of the guide cavity, and the guide cavity is communicated with the accommodating cavity;

the lower end of the body is provided with an inverted cone frustum-shaped one-way valve seat and a cylindrical part from bottom to top, rib plates which are uniformly distributed are arranged on the inner wall of the cylindrical part, the lower ends of the rib plates extend to the upper part of the inverted cone frustum-shaped one-way valve seat, and steps are arranged on the rib plates;

the movable piece comprises a rod body part and a valve core part, and the valve core part comprises a hollow inverted conical frustum-shaped core body and a cylindrical part; the lower end of the rod body part is fixedly connected with a bottom plate of the inverted cone frustum-shaped core body;

the rod body part is in sliding fit with the guide cavity, and the rod body part and the guide cavity are in liquid-gas sealing; the pressure spring is matched with the top plate and the step of the accommodating cavity; the inverted cone frustum-shaped core body is matched with the inverted cone frustum-shaped one-way valve seat, and the cylindrical body part is in sliding fit with the rib plate at the lower part of the step; the upper end of the valve core part is matched with the lower end of the pressure spring to stop.

2. A suck-back emulsion pump as claimed in claim 1, wherein: the outer circumferential surface of the cylindrical part of the valve core part is provided with a plurality of radial plates, and the radial plates are positioned between two adjacent rib plates.

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